Well, this is all rather off-topic for wine-devel - Win32 experts certainly do live here but you don't need Win32 experts for a project like this.
That said, I think you should compare the number of people wishing Linux has more Windows/Mac like package management vs the reverse before porting the spectacular piece of brokenness known as apt to Windows. Do that many people actually want it? I would guess not.
Remember that on Windows, the most popular programs aren't free anyway. Also remember that Windows programs don't usually have dependencies outside of the Win32 platform, making a tool like apt rather overkill. I suspect what you actually want is just a software catalogue or somesuch, but you can do that using a web page just as easily as a program ...
If you really want to go ahead I'd recommend something like Delphi or Visual Basic as a developer tool - raw C/C++ coding against Win32 is really quite nasty.
thanks -mike